631403260 has 12 divisors (see below), whose sum is σ = 1325946888. Its totient is φ = 252561296.

The previous prime is 631403237. The next prime is 631403293. The reversal of 631403260 is 62304136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15785062 + ... + 15785101.

It is an arithmetic number, because the mean of its divisors is an integer number (110495574).

Almost surely, 2^631403260 is an apocalyptic number.

It is an amenable number.

631403260 is an abundant number, since it is smaller than the sum of its proper divisors (694543628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

631403260 is a wasteful number, since it uses less digits than its factorization.

631403260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31570172 (or 31570170 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 631403260 is about 25127.7388556949. The cubic root of 631403260 is about 857.8979037147.

Adding to 631403260 its reverse (62304136), we get a palindrome (693707396).

The spelling of 631403260 in words is "six hundred thirty-one million, four hundred three thousand, two hundred sixty".